* subversion/tests/cmdline/svntest/actions.py   (set_prop): Fix handling of values starting with '-'.
* subversion/tests/cmdline/svntest/actions.py
  (set_prop): Fix handling of values starting with '-'.

Found by: danielsh


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@877106 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion